Democrats acknowledge they're going to be outspent in the Senate campaign.
The ad will air during Tuesday's presidential primary debate.
The GOP leads in Pennsylvania but trails in Florida Senate races, the new poll shows.
Ben Kamisar 10/07/15 04:41 PM EDT
Grayson filed an ethics complaint Wednesday against House leaders.
The Democratic former Ohio governor leads the incumbent Republican senator.
Hassan's entry gives Democrats their best shot at defeating Republican incumbent Ayotte.
Portman has $11 million in cash for his reelection fight.
The last poll showed the Democrat ahead by only 5 percentage points.
The Ohio Senate race is expected to be one of the most hotly contested in the nation.
The suburban Pittsburgh mayor calls the war on drugs a "horribly misguided, failed policy."